/**
 * Kahu Touch Typing Practice Stylesheet
 * Optimized for desktop and mobile viewports with accessibility and finger color-coding.
 */

/* ==========================================================================
   Typing Hub / Index Styles
   ========================================================================== */
.typing-hero {
  background: linear-gradient(135deg, #f5f3ff 0%, #ede9fe 100%);
  border-bottom: 1px solid #ddd6fe;
  padding: 3rem 0 2.5rem;
}

.typing-hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: #ffffff;
  padding: 0.35rem 1rem;
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 700;
  color: #7c3aed;
  box-shadow: var(--shadow-sm);
  margin-bottom: 1rem;
}

.typing-stats-banner {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1.25rem;
  margin-bottom: 2.5rem;
}

.typing-stat-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.25rem 1.5rem;
  box-shadow: var(--shadow-sm);
  display: flex;
  align-items: center;
  gap: 1rem;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.typing-stat-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.typing-stat-icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.typing-stat-val {
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--text-main);
  line-height: 1.2;
}

.typing-stat-lbl {
  font-size: 0.82rem;
  color: var(--text-muted);
  text-transform: uppercase;
  font-weight: 600;
  letter-spacing: 0.03em;
}

.typing-resume-box {
  background: linear-gradient(135deg, #ffffff 0%, #faf5ff 100%);
  border: 1.5px solid #c4b5fd;
  border-radius: var(--radius-lg);
  padding: 1.25rem 1.75rem;
  margin-bottom: 2.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1.25rem;
  box-shadow: var(--shadow-sm);
}

.typing-group-section {
  margin-bottom: 3rem;
}

.typing-group-header {
  margin-bottom: 1.25rem;
  padding-bottom: 0.75rem;
  border-bottom: 2px solid var(--border);
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.typing-group-title {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--text-main);
  display: flex;
  align-items: center;
  gap: 0.65rem;
}

.typing-lessons-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(270px, 1fr));
  gap: 1.25rem;
}

.typing-lesson-card {
  background: var(--surface);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  box-shadow: var(--shadow-sm);
  text-decoration: none;
  color: inherit;
  transition: transform var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast);
  position: relative;
}

.typing-lesson-card:hover {
  transform: translateY(-3px);
  border-color: #7c3aed;
  box-shadow: var(--shadow-md);
}

.typing-lesson-card.completed {
  border-color: #a7f3d0;
  background: #f0fdf4;
}

.typing-lesson-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.75rem;
}

.typing-lesson-num {
  font-size: 0.8rem;
  font-weight: 700;
  color: #7c3aed;
  background: #f5f3ff;
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-full);
}

.typing-lesson-name {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 0.35rem;
}

.typing-lesson-desc {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.5;
  margin-bottom: 1rem;
}

.typing-lesson-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 0.75rem;
  border-top: 1px solid var(--border-light);
  font-size: 0.82rem;
}

.typing-best-badge {
  font-weight: 700;
  color: #059669;
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
}

.typing-keys-preview {
  display: flex;
  gap: 0.25rem;
}

.key-mini-chip {
  background: var(--surface-alt);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 1px 5px;
  font-family: monospace;
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* Posture & Guide Callout */
.typing-guide-box {
  background: #ffffff;
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 2rem;
  margin-top: 2rem;
  box-shadow: var(--shadow-sm);
}

.posture-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.5rem;
  margin-top: 1.25rem;
}

.posture-item {
  display: flex;
  gap: 0.85rem;
  align-items: flex-start;
}

.posture-num {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: #f5f3ff;
  color: #7c3aed;
  font-weight: 800;
  font-size: 0.85rem;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin-top: 2px;
}

/* ==========================================================================
   Practice Session Stage Styles
   ========================================================================== */
.typing-practice-wrapper {
  max-width: 960px;
  margin: 0 auto;
}

.typing-header-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 1.25rem;
  width: 100%;
}

/* Live Metrics Ribbon */
.typing-metrics-ribbon {
  display: flex;
  align-items: center;
  gap: 1rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 0.65rem 1.25rem;
  box-shadow: var(--shadow-sm);
  max-width: 100%;
  box-sizing: border-box;
}

@media (max-width: 640px) {
  .typing-header-bar {
    flex-direction: column;
    align-items: stretch;
    gap: 0.85rem;
  }
  .typing-metrics-ribbon {
    width: 100%;
    justify-content: space-between;
    padding: 0.5rem 0.5rem;
    gap: 0.25rem;
  }
  .metric-pill {
    min-width: unset;
    flex: 1;
    text-align: center;
  }
  .metric-pill-val {
    font-size: 1.15rem;
  }
  .metric-pill-lbl {
    font-size: 0.62rem;
    white-space: nowrap;
  }
  .metric-divider {
    height: 22px;
  }
}

.metric-pill {
  display: flex;
  flex-direction: column;
  align-items: center;
  min-width: 60px;
}

.metric-pill-val {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--text-main);
  line-height: 1.1;
  font-variant-numeric: tabular-nums;
}

.metric-pill-lbl {
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
}

.metric-divider {
  width: 1px;
  height: 28px;
  background-color: var(--border);
}

/* Text Display Stage */
.typing-stage-card {
  background: var(--surface);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 2rem 2.25rem;
  box-shadow: var(--shadow-sm);
  margin-bottom: 1.5rem;
  position: relative;
  outline: none;
}

.typing-stage-card:focus-within {
  border-color: #7c3aed;
  box-shadow: 0 0 0 3px rgba(124, 58, 237, 0.15);
}

.typing-text-display {
  font-family: 'Be Vietnam Pro', system-ui, -apple-system, sans-serif;
  font-size: 24px;
  line-height: 2.1;
  letter-spacing: 0.02em;
  color: #64748b;
  user-select: none;
  min-height: 140px;
  word-break: break-word;
}

@media (max-width: 768px) {
  .typing-text-display {
    font-size: 19px;
    line-height: 1.9;
  }
}

/* Character states */
.char-correct {
  color: #059669;
  background-color: #d1fae5;
  border-radius: 3px;
}

.char-incorrect {
  color: #dc2626;
  background-color: #fee2e2;
  border-radius: 3px;
  text-decoration: underline wavy #ef4444;
}

.char-current {
  color: #ffffff !important;
  background-color: #7c3aed !important;
  border-radius: 3px;
  box-shadow: 0 0 0 2px #c4b5fd;
  animation: cursorPulse 1.2s infinite ease-in-out;
  position: relative;
}

@keyframes cursorPulse {
  0%, 100% {
    opacity: 1;
    transform: scale(1.02);
  }
  50% {
    opacity: 0.88;
    transform: scale(0.98);
  }
}

/* Space representation */
.char-space-current {
  display: inline-block;
  min-width: 14px;
  background-color: #7c3aed;
  color: #ffffff;
  border-radius: 3px;
  padding: 0 4px;
}

.char-space-current::after {
  content: '␣';
  font-size: 0.8em;
  font-weight: 700;
}

/* Hidden capture input */
.typing-hidden-input {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  cursor: default;
  z-index: 10;
  border: none;
  background: transparent;
  color: transparent;
}

/* Paste Warning Alert */
.typing-paste-warning {
  display: none;
  background: #fef2f2;
  border: 1.5px solid #f87171;
  border-radius: var(--radius-md);
  padding: 0.75rem 1rem;
  color: #991b1b;
  font-size: 0.88rem;
  margin-top: 1rem;
  align-items: center;
  gap: 0.5rem;
  animation: shake 0.3s ease-in-out;
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-6px); }
  75% { transform: translateX(6px); }
}

/* Controls Toolbar */
.typing-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

/* ==========================================================================
   Virtual Keyboard
   ========================================================================== */
.virtual-keyboard-wrapper {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 1.25rem;
  box-shadow: var(--shadow-sm);
  margin-bottom: 2rem;
  user-select: none;
  max-width: 100%;
  box-sizing: border-box;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

@media (max-width: 768px) {
  .virtual-keyboard-wrapper {
    padding: 0.85rem 0.5rem;
  }
  .kb-container {
    min-width: 640px; /* Allows horizontal scrolling inside wrapper without widening entire window */
  }
}

.virtual-keyboard-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.85rem;
}

.kb-container {
  display: flex;
  flex-direction: column;
  gap: 6px;
  max-width: 900px;
  margin: 0 auto;
}

.kb-row {
  display: flex;
  gap: 6px;
  justify-content: center;
  width: 100%;
}

.kb-key {
  height: 48px;
  min-width: 44px;
  flex: 1;
  border-radius: 6px;
  border: 1px solid #cbd5e1;
  background: #f8fafc;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  font-family: inherit;
  font-size: 0.95rem;
  font-weight: 700;
  color: #1e293b;
  box-shadow: 0 2px 0 #94a3b8;
  position: relative;
  transition: all 0.12s ease;
}

.kb-key-wide-1 { flex: 1.5; }
.kb-key-wide-2 { flex: 1.8; }
.kb-key-wide-3 { flex: 2.2; }
.kb-key-space { flex: 6; }

/* Finger Color-Coding */
.finger-l-pinky, .finger-r-pinky { background: #fce7f3; border-color: #f472b6; }
.finger-l-ring, .finger-r-ring { background: #ffedd5; border-color: #fb923c; }
.finger-l-middle, .finger-r-middle { background: #fef9c3; border-color: #facc15; }
.finger-l-index { background: #dcfce7; border-color: #4ade80; }
.finger-r-index { background: #e0f2fe; border-color: #38bdf8; }
.finger-thumb { background: #ede9fe; border-color: #a78bfa; }

/* Homing bumps for F and J */
.kb-key-f::after, .kb-key-j::after {
  content: '';
  position: absolute;
  bottom: 6px;
  width: 12px;
  height: 2px;
  background-color: #475569;
  border-radius: 2px;
}

/* Active Highlight for Next Key */
.kb-key.key-next {
  background-color: #7c3aed !important;
  color: #ffffff !important;
  border-color: #6d28d9 !important;
  box-shadow: 0 0 0 3px #c4b5fd, 0 3px 0 #4c1d95 !important;
  transform: translateY(-2px);
  animation: keyGlow 0.8s infinite alternate;
}

@keyframes keyGlow {
  from { filter: brightness(1); }
  to { filter: brightness(1.2); }
}

/* Finger Legend */
.finger-legend {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 0.75rem 1.25rem;
  margin-top: 1rem;
  padding-top: 0.75rem;
  border-top: 1px solid var(--border-light);
  font-size: 0.78rem;
  color: var(--text-muted);
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.legend-dot {
  width: 12px;
  height: 12px;
  border-radius: 3px;
  border: 1px solid rgba(0,0,0,0.15);
}

@media (max-width: 640px) {
  .kb-key {
    height: 36px;
    font-size: 0.75rem;
  }
  .kb-container {
    gap: 3px;
  }
  .kb-row {
    gap: 3px;
  }
}

/* ==========================================================================
   Summary Modal & Results Card
   ========================================================================== */
.typing-summary-card {
  display: none;
  background: var(--surface);
  border: 2px solid #7c3aed;
  border-radius: var(--radius-xl);
  padding: 2.5rem 2rem;
  text-align: center;
  box-shadow: var(--shadow-xl);
  animation: summaryPop 0.25s ease-out;
}

@keyframes summaryPop {
  from { opacity: 0; transform: scale(0.97); }
  to { opacity: 1; transform: scale(1); }
}

.summary-score-hero {
  font-size: 3.5rem;
  font-weight: 800;
  color: #7c3aed;
  line-height: 1;
  margin-bottom: 0.25rem;
}

.summary-badge-newbest {
  display: inline-block;
  background: #fef08a;
  color: #854d0e;
  border: 1px solid #eab308;
  padding: 0.2rem 0.75rem;
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-weight: 800;
  margin-bottom: 1rem;
}

.summary-metrics-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
  margin: 1.75rem 0;
  padding: 1.25rem;
  background: var(--surface-alt);
  border-radius: var(--radius-lg);
}

@media (max-width: 640px) {
  .summary-metrics-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.summary-actions-row {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.5rem;
}